The external grinding regulator can adjust the grinding degree more conveniently and accurately, which is an improvement over the first generation. We have been improving the product according to the needs of most customers.The lid can be combined with the plastic container of the grinder to turn into a storage tank for ground coffee.Easy to use, one button start,press start and it can turn off automatic . You can keep it in your bag or suitcase so you can enjoy freshly ground coffee whenever you want, whether you're at home, in the office, traveling, hiking, camping...Can support mobile power charging.